agreed..... it gets really serious when my 15 Watt units knock a hole thru a 20mm work bench by the time I've realised whats going on & i scramble for the off button without running my fingers thru the beam or the fire that has erupted on the bench....

Darn, thats a shame, As for my own personal machine, I had ideas of the laser folding away so as to protect it from dust ingress.

The other option I guess, is to have a 2nd set of homing micro switches in series, so that when both activated, they trigger a PWM signal generator/servo tester to fold the laser away interdependently of the EleksMana Electronics.